How To Reset Ao Smith Water Heater: A Step-by-Step Guide.

To reset an ao smith water heater, turn off the gas or power supply, wait for the water to cool down, and press the reset button. Ao smith water heaters have a built-in safety mechanism that shuts off the gas or power when there is a problem, which can be reset to restore operation.

Ao smith is a well-known brand in the water heater market, providing various models of top-quality heaters for both residential and commercial use. If you’re experiencing a problem with your ao smith water heater, resetting it is often the first step in troubleshooting.

In this article, we’ll guide you on the steps to reset an ao smith water heater. Whether it’s a gas or electric heater, we’ll provide you with the necessary information to get your heater back up and running efficiently. So, let’s dive in.

How To Reset Ao Smith Water Heater: A Step-by-Step Guide.


Common Reasons Why You Need To Reset Your Ao Smith Water Heater

Has your ao smith water heater stopped working? Before calling for professional help, there are a few things you can do to try and fix it. One of the most common solutions is resetting the heater. Here are some of the most frequent reasons why you might need to reset your ao smith water heater:

Water Heater Malfunctioning

The malfunctioning of your water heater could be due to a variety of reasons from minor to major issues. Here are some of the most common issues that cause your ao smith water heater to malfunction:

  • Sediment buildup: Over time, deposits of sediment can build up at the bottom of your water heater’s tank, causing it to overheat. This, in turn, can trigger the high limit switch to cut off the power supply to the heating element.
  • Broken heating element: The heating element is responsible for heating the water in your tank. If it becomes damaged, your water heater won’t heat the water to the required temperature, causing the water to feel cold.
  • Faulty temperature and pressure relief valve: The temperature and pressure relief valve is designed to regulate the temperature and pressure inside the tank. If it becomes faulty, it can trigger the high limit switch to turn the power off, making a reset necessary.
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Power Outage Or Surge

If your home experiences sudden power surges or outages, it could lead to your ao smith water heater tripping the circuit breaker. Here are some common reasons why a power surge or outage could trigger the circuit breaker:

  • Overheating: If your water heater is experiencing a power surge when it’s overheating, it can trip the circuit breaker.
  • Power outage: A sudden power outage can cause your water heater to shut off and require resetting when the power is restored.
  • Loose wiring: Sometimes the wiring in your house or the water heater might be loose, causing the water heater to trip the circuit breaker.

Incorrect Thermostat Setting

Another reason why you might need to reset your ao smith water heater is due to a wrong thermostat setting. Here’s why:

  • Thermostat set too low: If you have your thermostat set too low, it can cause the water heater to shut off, leading to your water feeling cold.
  • Thermostat set too high: If your thermostat is set too high, it could cause the high limit switch to trip, leading to the water heater shutting off.

With these tips, you can quickly reset your ao smith water heater and get it up and running again without calling in professionals.

Step-By-Step Guide: How To Reset Your Ao Smith Water Heater

Ao smith water heaters are a reliable option for any household. However, sometimes they may encounter a hiccup and require resetting to restore normal functionality. But how exactly do you reset your ao smith water heater? Follow these simple steps to reset your water heater and get your water supply running smoothly again.

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Turn Off The Power Supply To The Water Heater

Before resetting your ao smith water heater, ensure that you turn off the power supply. This prevents any electrical incident and keeps you safe.

Locate The Reset Button On The Control Panel

The reset button is located on the control panel of your ao smith water heater. Identify the button and proceed with the reset.

Press The Reset Button

Press and hold the reset button for a few seconds. This resets the settings on the control board.

Wait For The Water Heater To Start Up

Your water heater will begin to start up again after the reset. Give it a few minutes to warm up and get ready.

Check For Any Error Codes On The Control Panel Display

After the water heater starts, check the control panel display for any error codes. This way, if the problem is not resolved, you will have an idea of the next steps to take.

Adjust The Thermostat To The Desired Temperature

Once your ao smith water heater has started up again, adjust the temperature to the desired setting. This ensures that the water is at the right temperature and, at the same time, saves energy by avoiding overheating.

Turn The Power Back On

Turn the power supply back on to the water heater after resetting the settings and adjusting the temperature. This restores power to the control board and gets your water heater back online.

Resetting your ao smith water heater is pretty easy. Taking the steps mentioned above ensures you get your water back running in no time.

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Overall, resetting your ao smith water heater can be easily accomplished by following a few simple steps. By turning off the power supply, draining the tank, and resetting the system, you can ensure that your hot water supply will be operating at maximum efficiency once again.

Remember to always refer to your owner’s manual before attempting any diy fixes to your water heater to avoid any potential risks. Regular maintenance and servicing of your water heater can also help prevent any future issues from arising. By taking the time to properly care for your water heater, you can guarantee a continuous and reliable hot water supply for years to come.

So, go ahead and reset your ao smith water heater today, and enjoy the benefits of a functional and efficient hot water system.


I am a mechanical engineer and love doing research on different home and outdoor heating options. When I am not working, I love spending time with my family and friends. I also enjoy blogging about my findings and helping others to find the best heating options for their needs.